From 5305611be392b20c02c54f1f9868fe15c974e5fc Mon Sep 17 00:00:00 2001
From: Moises Silva <moy@sangoma.com>
Date: Fri, 12 Mar 2010 18:27:24 +0000
Subject: [PATCH] added generic interrupt support

git-svn-id: http://svn.openzap.org/svn/openzap/branches/sangoma_boost@1057 a93c3328-9c30-0410-af19-c9cd2b2d52af
---
 libs/freetdm/TODO                             |   2 +
 libs/freetdm/src/ftdm_io.c                    | 138 ++++++++----
 libs/freetdm/src/ftdm_queue.c                 |  29 ++-
 libs/freetdm/src/ftdm_threadmutex.c           | 209 +++++++++++++-----
 .../ftmod_sangoma_boost/ftdm_sangoma_boost.h  |   2 -
 .../ftmod_sangoma_boost/ftmod_sangoma_boost.c | 136 +++++-------
 .../sangoma_boost_client.c                    |   6 +-
 .../sangoma_boost_client.h                    |   2 +-
 libs/freetdm/src/include/freetdm.h            |  69 +++---
 libs/freetdm/src/include/ftdm_threadmutex.h   |  11 +-
 libs/freetdm/src/include/ftdm_types.h         |   1 +
 11 files changed, 372 insertions(+), 233 deletions(-)

diff --git a/libs/freetdm/TODO b/libs/freetdm/TODO
index fb297b2eef..45b134bad3 100644
--- a/libs/freetdm/TODO
+++ b/libs/freetdm/TODO
@@ -5,3 +5,5 @@
   then ftdm_event_t would be renamed to ftdm_oob_event_t and the enum_id renamed to type, then ftdm_span_next_event()
   will only return OOB events
 
+- query span hw status (connected/disconnected) on startup 
+
diff --git a/libs/freetdm/src/ftdm_io.c b/libs/freetdm/src/ftdm_io.c
index 3e6cdef0e9..221bf34117 100644
--- a/libs/freetdm/src/ftdm_io.c
+++ b/libs/freetdm/src/ftdm_io.c
@@ -49,6 +49,8 @@
 #include "ftdm_pika.h"
 #endif
 
+#define SPAN_PENDING_CHANS_QUEUE_SIZE 1000
+
 static int time_is_init = 0;
 
 static void time_init(void)
@@ -410,6 +412,7 @@ static ftdm_status_t ftdm_span_destroy(ftdm_span_t *span)
 	}
 
 	/* destroy final basic resources of the span data structure */
+	ftdm_queue_destroy(&span->pendingchans);
 	ftdm_mutex_unlock(span->mutex);
 	ftdm_mutex_destroy(&span->mutex);
 	ftdm_safe_free(span->signal_data);
@@ -504,16 +507,19 @@ FT_DECLARE(ftdm_status_t) ftdm_span_create(ftdm_io_interface_t *fio, ftdm_span_t
 	ftdm_span_t *new_span = NULL;
 	ftdm_status_t status = FTDM_FAIL;
 
-	assert(fio != NULL);
+	ftdm_assert(fio != NULL, "No IO provided\n");
 
 	ftdm_mutex_lock(globals.mutex);
 
 	if (globals.span_index < FTDM_MAX_SPANS_INTERFACE) {
-		new_span = ftdm_malloc(sizeof(*new_span));
-		assert(new_span);
-		memset(new_span, 0, sizeof(*new_span));
+		new_span = ftdm_calloc(sizeof(*new_span), 1);
+		ftdm_assert(new_span, "allocating span failed\n");
+
 		status = ftdm_mutex_create(&new_span->mutex);
-		assert(status == FTDM_SUCCESS);
+		ftdm_assert(status == FTDM_SUCCESS, "mutex creation failed\n");
+
+		status = ftdm_queue_create(&new_span->pendingchans, SPAN_PENDING_CHANS_QUEUE_SIZE);
+		ftdm_assert(status == FTDM_SUCCESS, "span chans queue creation failed\n");
 		
 		ftdm_set_flag(new_span, FTDM_SPAN_CONFIGURED);
 		new_span->span_id = ++globals.span_index;
@@ -1154,7 +1160,12 @@ FT_DECLARE(ftdm_status_t) ftdm_channel_set_state(ftdm_channel_t *ftdmchan, ftdm_
 
 	if (ok) {
 		ftdm_set_flag(ftdmchan, FTDM_CHANNEL_STATE_CHANGE);	
-		ftdm_set_flag_locked(ftdmchan->span, FTDM_SPAN_STATE_CHANGE);	
+
+		ftdm_mutex_lock(ftdmchan->span->mutex);
+		ftdm_set_flag(ftdmchan->span, FTDM_SPAN_STATE_CHANGE);
+		ftdm_queue_enqueue(ftdmchan->span->pendingchans, ftdmchan);
+		ftdm_mutex_unlock(ftdmchan->span->mutex);
+
 		ftdmchan->last_state = ftdmchan->state; 
 		ftdmchan->state = state;
 	}
@@ -3155,44 +3166,85 @@ FT_DECLARE(int) ftdm_load_modules(void)
 
 FT_DECLARE(ftdm_status_t) ftdm_unload_modules(void)
 {
-	ftdm_hash_iterator_t *i;
-	ftdm_dso_lib_t lib;
+	ftdm_hash_iterator_t *i = NULL;
+	ftdm_dso_lib_t lib = NULL;
+	char modpath[255] = { 0 };
 
+	/* stop signaling interfaces first as signaling depends on I/O and not the other way around */
 	for (i = hashtable_first(globals.module_hash); i; i = hashtable_next(i)) {
-		const void *key;
-		void *val;
+		const void *key = NULL;
+		void *val = NULL;
+		ftdm_module_t *mod = NULL;
 
 		hashtable_this(i, &key, NULL, &val);
 		
-		if (key && val) {
-			ftdm_module_t *mod = (ftdm_module_t *) val;
-
-			if (!mod) {
-				continue;
-			}
-
-			if (mod->io_unload) {
-				if (mod->io_unload() == FTDM_SUCCESS) {
-					ftdm_log(FTDM_LOG_INFO, "Unloading IO %s\n", mod->name);
-				} else {
-					ftdm_log(FTDM_LOG_ERROR, "Error unloading IO %s\n", mod->name);
-				}
-			} 
-
-			if (mod->sig_unload) {
-				if (mod->sig_unload() == FTDM_SUCCESS) {
-					ftdm_log(FTDM_LOG_INFO, "Unloading SIG %s\n", mod->name);
-				} else {
-					ftdm_log(FTDM_LOG_ERROR, "Error unloading SIG %s\n", mod->name);
-				}
-			} 
-			
-
-			ftdm_log(FTDM_LOG_INFO, "Unloading %s\n", mod->path);
-			lib = mod->lib;
-			ftdm_dso_destroy(&lib);
-			
+		if (!key || !val) {
+			continue;
 		}
+		
+		mod = (ftdm_module_t *) val;
+
+		if (!mod->sig_unload) {
+			continue;
+		}
+
+		ftdm_log(FTDM_LOG_INFO, "Unloading signaling interface %s\n", mod->name);
+		
+		if (mod->sig_unload() != FTDM_SUCCESS) {
+			ftdm_log(FTDM_LOG_ERROR, "Error unloading signaling interface %s\n", mod->name);
+			continue;
+		}
+
+		ftdm_log(FTDM_LOG_INFO, "Unloaded signaling interface %s\n", mod->name);
+	}
+
+	/* Now go ahead with I/O interfaces */
+	for (i = hashtable_first(globals.module_hash); i; i = hashtable_next(i)) {
+		const void *key = NULL;
+		void *val = NULL;
+		ftdm_module_t *mod = NULL;
+
+		hashtable_this(i, &key, NULL, &val);
+		
+		if (!key || !val) {
+			continue;
+		}
+		
+		mod = (ftdm_module_t *) val;
+
+		if (!mod->io_unload) {
+			continue;
+		}
+
+		ftdm_log(FTDM_LOG_INFO, "Unloading I/O interface %s\n", mod->name);
+		
+		if (mod->io_unload() != FTDM_SUCCESS) {
+			ftdm_log(FTDM_LOG_ERROR, "Error unloading I/O interface %s\n", mod->name);
+			continue;
+		}
+
+		ftdm_log(FTDM_LOG_INFO, "Unloaded I/O interface %s\n", mod->name);
+	}
+
+	/* Now unload the actual shared object/dll */
+	for (i = hashtable_first(globals.module_hash); i; i = hashtable_next(i)) {
+		ftdm_module_t *mod = NULL;
+		const void *key = NULL;
+		void *val = NULL;
+
+		hashtable_this(i, &key, NULL, &val);
+
+		if (!key || !val) {
+			continue;
+		}
+
+		mod = (ftdm_module_t *) val;
+
+		lib = mod->lib;
+		snprintf(modpath, sizeof(modpath), "%s", mod->path);
+		ftdm_log(FTDM_LOG_INFO, "Unloading module %s\n", modpath);
+		ftdm_dso_destroy(&lib);
+		ftdm_log(FTDM_LOG_INFO, "Unloaded module %s\n", modpath);
 	}
 
 	return FTDM_SUCCESS;
@@ -3506,8 +3558,12 @@ FT_DECLARE(ftdm_status_t) ftdm_global_destroy(void)
 	time_end();
 
 	globals.running = 0;	
+
+	globals.span_index = 0;
+
 	ftdm_span_close_all();
-	ftdm_sleep(1000);
+	
+	ftdm_unload_modules();
 
 	ftdm_mutex_lock(globals.span_mutex);
 	for (sp = globals.spans; sp;) {
@@ -3529,10 +3585,6 @@ FT_DECLARE(ftdm_status_t) ftdm_global_destroy(void)
 	globals.spans = NULL;
 	ftdm_mutex_unlock(globals.span_mutex);
 
-	globals.span_index = 0;
-	
-	ftdm_unload_modules();
-
 	ftdm_mutex_lock(globals.mutex);
 	hashtable_destroy(globals.interface_hash);
 	hashtable_destroy(globals.module_hash);
diff --git a/libs/freetdm/src/ftdm_queue.c b/libs/freetdm/src/ftdm_queue.c
index 92ea75c57a..60ee74737d 100644
--- a/libs/freetdm/src/ftdm_queue.c
+++ b/libs/freetdm/src/ftdm_queue.c
@@ -38,11 +38,12 @@ static ftdm_status_t ftdm_std_queue_create(ftdm_queue_t **outqueue, ftdm_size_t
 static ftdm_status_t ftdm_std_queue_enqueue(ftdm_queue_t *queue, void *obj);
 static void *ftdm_std_queue_dequeue(ftdm_queue_t *queue);
 static ftdm_status_t ftdm_std_queue_wait(ftdm_queue_t *queue, int ms);
+static ftdm_status_t ftdm_std_queue_get_interrupt(ftdm_queue_t *queue, ftdm_interrupt_t **interrupt);
 static ftdm_status_t ftdm_std_queue_destroy(ftdm_queue_t **inqueue);
 
 struct ftdm_queue {
 	ftdm_mutex_t *mutex;
-	ftdm_condition_t *condition;
+	ftdm_interrupt_t *interrupt;
 	ftdm_size_t capacity;
 	ftdm_size_t size;
 	unsigned rindex;
@@ -56,6 +57,7 @@ FT_DECLARE_DATA ftdm_queue_handler_t g_ftdm_queue_handler =
 	/*.enqueue = */ ftdm_std_queue_enqueue,
 	/*.dequeue = */ ftdm_std_queue_dequeue,
 	/*.wait = */ ftdm_std_queue_wait,
+	/*.get_interrupt = */ ftdm_std_queue_get_interrupt,
 	/*.destroy = */ ftdm_std_queue_destroy
 };
 
@@ -66,6 +68,7 @@ FT_DECLARE(ftdm_status_t) ftdm_global_set_queue_handler(ftdm_queue_handler_t *ha
 		!handler->enqueue || 
 		!handler->dequeue || 
 		!handler->wait || 
+		!handler->get_interrupt || 
 		!handler->destroy) {
 		return FTDM_FAIL;
 	}
@@ -95,7 +98,7 @@ static ftdm_status_t ftdm_std_queue_create(ftdm_queue_t **outqueue, ftdm_size_t
 		goto failed;
 	}
 
-	if (ftdm_condition_create(&queue->condition, queue->mutex) != FTDM_SUCCESS) {
+	if (ftdm_interrupt_create(&queue->interrupt, FTDM_INVALID_SOCKET) != FTDM_SUCCESS) {
 		goto failed;
 	}
 
@@ -104,8 +107,8 @@ static ftdm_status_t ftdm_std_queue_create(ftdm_queue_t **outqueue, ftdm_size_t
 
 failed:
 	if (queue) {
-		if (queue->condition) {
-			ftdm_condition_destroy(&queue->condition);
+		if (queue->interrupt) {
+			ftdm_interrupt_destroy(&queue->interrupt);
 		}
 		if (queue->mutex) {
 			ftdm_mutex_destroy(&queue->mutex);
@@ -139,7 +142,7 @@ static ftdm_status_t ftdm_std_queue_enqueue(ftdm_queue_t *queue, void *obj)
 	status = FTDM_SUCCESS;
 
 	/* wake up queue reader */
-	ftdm_condition_signal(queue->condition);
+	ftdm_interrupt_signal(queue->interrupt);
 
 done:
 
@@ -188,7 +191,7 @@ static ftdm_status_t ftdm_std_queue_wait(ftdm_queue_t *queue, int ms)
 	}
 
 	/* no elements on the queue, wait for someone to write an element */
-	ret = ftdm_condition_wait(queue->condition, ms);
+	ret = ftdm_interrupt_wait(queue->interrupt, ms);
 
 	/* got an element or timeout, bail out */
 	ftdm_mutex_unlock(queue->mutex);
@@ -196,14 +199,22 @@ static ftdm_status_t ftdm_std_queue_wait(ftdm_queue_t *queue, int ms)
 	return ret;
 }
 
+static ftdm_status_t ftdm_std_queue_get_interrupt(ftdm_queue_t *queue, ftdm_interrupt_t **interrupt)
+{
+	ftdm_assert_return(queue != NULL, FTDM_FAIL, "Queue is null!\n");
+	ftdm_assert_return(interrupt != NULL, FTDM_FAIL, "Queue is null!\n");
+	*interrupt = queue->interrupt;
+	return FTDM_SUCCESS;
+}
+
 static ftdm_status_t ftdm_std_queue_destroy(ftdm_queue_t **inqueue)
 {
 	ftdm_queue_t *queue = NULL;
-	ftdm_assert_return(inqueue != NULL, FTDM_FAIL, "Queue is null!");
-	ftdm_assert_return(*inqueue != NULL, FTDM_FAIL, "Queue is null!");
+	ftdm_assert_return(inqueue != NULL, FTDM_FAIL, "Queue is null!\n");
+	ftdm_assert_return(*inqueue != NULL, FTDM_FAIL, "Queue is null!\n");
 
 	queue = *inqueue;
-	ftdm_condition_destroy(&queue->condition);
+	ftdm_interrupt_destroy(&queue->interrupt);
 	ftdm_mutex_destroy(&queue->mutex);
 	ftdm_safe_free(queue->elements);
 	ftdm_safe_free(queue);
diff --git a/libs/freetdm/src/ftdm_threadmutex.c b/libs/freetdm/src/ftdm_threadmutex.c
index 7446896dcd..49cdb59cc1 100644
--- a/libs/freetdm/src/ftdm_threadmutex.c
+++ b/libs/freetdm/src/ftdm_threadmutex.c
@@ -40,6 +40,7 @@ struct ftdm_mutex {
 
 #else
 #include <pthread.h>
+#include <poll.h>
 
 #define FTDM_THREAD_CALLING_CONVENTION
 
@@ -49,16 +50,18 @@ struct ftdm_mutex {
 
 #endif
 
-struct ftdm_condition {
+struct ftdm_interrupt {
+	ftdm_socket_t device;
 #ifdef WIN32
-	HANDLE condition;
+	/* for generic interruption */
+	HANDLE event;
 #else
-	pthread_cond_t condition;
+	/* for generic interruption */
+	int readfd;
+	int writefd;
 #endif
-	ftdm_mutex_t *mutex;
 };
 
-
 struct ftdm_thread {
 #ifdef WIN32
 	void *handle;
@@ -238,123 +241,207 @@ FT_DECLARE(ftdm_status_t) _ftdm_mutex_unlock(ftdm_mutex_t *mutex)
 }
 
 
-FT_DECLARE(ftdm_status_t) ftdm_condition_create(ftdm_condition_t **incondition, ftdm_mutex_t *mutex)
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_create(ftdm_interrupt_t **ininterrupt, ftdm_socket_t device)
 {
-	ftdm_condition_t *condition = NULL;
+	ftdm_interrupt_t *interrupt = NULL;
+#ifndef WIN32
+	int fds[2];
+#endif
 
-	ftdm_assert_return(incondition != NULL, FTDM_FAIL, "Condition double pointer is null!\n");
-	ftdm_assert_return(mutex != NULL, FTDM_FAIL, "Mutex for condition must not be null!\n");
+	ftdm_assert_return(ininterrupt != NULL, FTDM_FAIL, "interrupt double pointer is null!\n");
 
-	condition = ftdm_calloc(1, sizeof(*condition));
-	if (!condition) {
+	interrupt = ftdm_calloc(1, sizeof(*interrupt));
+	if (!interrupt) {
+		ftdm_log(FTDM_LOG_ERROR, "Failed to allocate interrupt memory\n");
 		return FTDM_FAIL;
 	}
 
-	condition->mutex = mutex;
+	interrupt->device = device;
 #ifdef WIN32
-	condition->condition = CreateEvent(NULL, FALSE, FALSE, NULL);
-	if (!condition->condition) {
+	interrupt->interrupt = CreateEvent(NULL, FALSE, FALSE, NULL);
+	if (!interrupt->interrupt) {
+		ftdm_log(FTDM_LOG_ERROR, "Failed to allocate interrupt event\n");
 		goto failed;
 	}
 #else
-	if (pthread_cond_init(&condition->condition, NULL)) {
+	if (pipe(fds)) {
+		ftdm_log(FTDM_LOG_ERROR, "Failed to allocate interrupt pipe: %s\n", strerror(errno));
 		goto failed;
 	}
+	interrupt->readfd = fds[0];
+	interrupt->writefd = fds[1];
 #endif
 
-	*incondition = condition;
+	*ininterrupt = interrupt;
 	return FTDM_SUCCESS;
 
 failed:
-	if (condition) {
-		ftdm_safe_free(condition);
+	if (interrupt) {
+#ifndef WIN32
+		if (interrupt->readfd) {
+			close(interrupt->readfd);
+			close(interrupt->writefd);
+			interrupt->readfd = -1;
+			interrupt->writefd = -1;
+		}
+#endif
+		ftdm_safe_free(interrupt);
 	}
 	return FTDM_FAIL;
 }
 
 #define ONE_BILLION 1000000000
 
-FT_DECLARE(ftdm_status_t) ftdm_condition_wait(ftdm_condition_t *condition, int ms)
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_wait(ftdm_interrupt_t *interrupt, int ms)
 {
+	int num = 1;
 #ifdef WIN32
 	DWORD res = 0;
+	HANDLE ints[2];
+#else
+	int res = 0;
+	struct pollfd ints[2];
+	char pipebuf[255];
 #endif
-	ftdm_assert_return(condition != NULL, FTDM_FAIL, "Condition is null!\n");
+
+	ftdm_assert_return(interrupt != NULL, FTDM_FAIL, "Condition is null!\n");
+
+
+	/* start implementation */
 #ifdef WIN32
-	ftdm_mutex_unlock(condition->mutex);
-	res = WaitForSingleObject(condition->condition, ms > 0 ? ms : INFINITE);
-	ftdm_mutex_lock(condition->mutex);
+	ints[0] = interrupt->event;
+	if (interrupt->device != FTDM_INVALID_SOCKET) {
+		num++;
+		ints[1] = interrupt->device;
+	}
+	res = WaitForMultipleObjects(num, &ints, FALSE, ms >= 0 ? ms : INFINITE);
 	switch (res) {
-	case WAIT_ABANDONED:
 	case WAIT_TIMEOUT:
 		return FTDM_TIMEOUT;
 	case WAIT_FAILED:
+	case WAIT_ABANDONED: /* is it right to fail with abandoned? */
 		return FTDM_FAIL;
-	case WAIT_OBJECT_0:
-		return FTDM_SUCCESS;
 	default:
-		ftdm_log(FTDM_LOG_ERROR, "Error waiting for freetdm condition event (WaitForSingleObject returned %d)\n", res);
-		return FTDM_FAIL;
+		if (res >= (sizeof(ints)/sizeof(ints[0]))) {
+			ftdm_log(FTDM_LOG_ERROR, "Error waiting for freetdm interrupt event (WaitForSingleObject returned %d)\n", res);
+			return FTDM_FAIL;
+		}
+		return FTDM_SUCCESS;
 	}
 #else
-	int res = 0;
-	if (ms > 0) {
-		struct timeval t;
-		struct timespec waitms;
-		gettimeofday(&t, NULL);
-		waitms.tv_sec = t.tv_sec + ( ms / 1000 );
-		waitms.tv_nsec = 1000*(t.tv_usec + (1000 * ( ms % 1000 )));
-		if (waitms.tv_nsec >= ONE_BILLION) {
-				waitms.tv_sec++;
-				waitms.tv_nsec -= ONE_BILLION;
-		}
-		res = pthread_cond_timedwait(&condition->condition, &condition->mutex->mutex, &waitms);
-	} else {
-		res = pthread_cond_wait(&condition->condition, &condition->mutex->mutex);
-	}
-	if (res != 0) {
-		if (res == ETIMEDOUT) {
-			return FTDM_TIMEOUT;
-		}
+	ints[0].fd = interrupt->readfd;
+	ints[0].events = POLLIN;
+	ints[0].revents = 0;
 
-		ftdm_log(FTDM_LOG_CRIT,"pthread_cond_timedwait failed (%d)\n", res);
+	if (interrupt->device != FTDM_INVALID_SOCKET) {
+		num++;
+		ints[1].fd = interrupt->device;
+		ints[1].events = POLLIN;
+		ints[1].revents = 0;
+	}
+
+	res = poll(ints, num, ms);
+
+	if (res == -1) {
+		ftdm_log(FTDM_LOG_CRIT, "interrupt poll failed (%s)\n", strerror(errno));
 		return FTDM_FAIL;
 	}
+
+	if (res == 0) {
+		return FTDM_TIMEOUT;
+	}
+
+	if (ints[0].revents & POLLIN) {
+		res = read(ints[0].fd, pipebuf, sizeof(pipebuf));
+		if (res == -1) {
+			ftdm_log(FTDM_LOG_CRIT, "reading interrupt descriptor failed (%s)\n", strerror(errno));
+		}
+	}
+
 	return FTDM_SUCCESS;
 #endif
 }
 
-FT_DECLARE(ftdm_status_t) ftdm_condition_signal(ftdm_condition_t *condition)
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_signal(ftdm_interrupt_t *interrupt)
 {
-	ftdm_assert_return(condition != NULL, FTDM_FAIL, "Condition is null!\n");
+	ftdm_assert_return(interrupt != NULL, FTDM_FAIL, "Interrupt is null!\n");
 #ifdef WIN32
-	if (!SetEvent(condition->condition)) {
+	if (!SetEvent(interrupt->interrupt)) {
+		ftdm_log(FTDM_LOG_ERROR, "Failed to signal interrupt\n");
 		return FTDM_FAIL;
 	}
 #else
 	int err;
-	if ((err = pthread_cond_signal(&condition->condition))) {
-		ftdm_log(FTDM_LOG_ERROR, "Failed to signal condition %d:%s\n", err, strerror(err));
+	if ((err = write(interrupt->writefd, "w", 1)) != 1) {
+		ftdm_log(FTDM_LOG_ERROR, "Failed to signal interrupt: %s\n", errno, strerror(errno));
 		return FTDM_FAIL;
 	}
 #endif
 	return FTDM_SUCCESS;
 }
 
-FT_DECLARE(ftdm_status_t) ftdm_condition_destroy(ftdm_condition_t **incondition)
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_destroy(ftdm_interrupt_t **ininterrupt)
 {
-	ftdm_condition_t *condition = NULL;
-	ftdm_assert_return(incondition != NULL, FTDM_FAIL, "Condition null when destroying!\n");
-	condition = *incondition;
+	ftdm_interrupt_t *interrupt = NULL;
+	ftdm_assert_return(ininterrupt != NULL, FTDM_FAIL, "Interrupt null when destroying!\n");
+	interrupt = *ininterrupt;
 #ifdef WIN32
-	CloseHandle(condition->condition);
+	CloseHandle(interrupt->interrupt);
 #else
-	if (pthread_cond_destroy(&condition->condition)) {
+	close(interrupt->readfd);
+	close(interrupt->writefd);
+	interrupt->readfd = -1;
+	interrupt->writefd = -1;
+#endif
+	ftdm_safe_free(interrupt);
+	*ininterrupt = NULL;
+	return FTDM_SUCCESS;
+}
+
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_multiple_wait(ftdm_interrupt_t *interrupts[], ftdm_size_t size, int ms)
+{
+#ifndef WIN32
+	int i;
+	int res = 0;
+	int numdevices = 0;
+	char pipebuf[255];
+	struct pollfd ints[size*2];
+
+	memset(&ints, 0, sizeof(ints));
+
+	for (i = 0; i < size; i++) {
+		ints[i].events = POLLIN;
+		ints[i].revents = 0;
+		ints[i].fd = interrupts[i]->readfd;
+		if (interrupts[i]->device != FTDM_INVALID_SOCKET) {
+			ints[i+numdevices].events = POLLIN;
+			ints[i+numdevices].revents = 0;
+			ints[i+numdevices].fd = interrupts[i]->device;
+			numdevices++;
+		}
+	}
+
+	res = poll(ints, size + numdevices, ms);
+
+	if (res == -1) {
+		ftdm_log(FTDM_LOG_CRIT, "interrupt poll failed (%s)\n", strerror(errno));
 		return FTDM_FAIL;
 	}
+
+	if (res == 0) {
+		return FTDM_TIMEOUT;
+	}
+
+	for (i = size; i < ftdm_array_len(ints); i++) {
+		if (ints[i].revents & POLLIN) {
+			res = read(ints[0].fd, pipebuf, sizeof(pipebuf));
+			if (res == -1) {
+				ftdm_log(FTDM_LOG_CRIT, "reading interrupt descriptor failed (%s)\n", strerror(errno));
+			}
+		}
+	}
+
 #endif
-	ftdm_safe_free(condition);
-	*incondition = NULL;
 	return FTDM_SUCCESS;
 }
 
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftdm_sangoma_boost.h b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftdm_sangoma_boost.h
index d4659b1141..31a231f309 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftdm_sangoma_boost.h
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftdm_sangoma_boost.h
@@ -46,8 +46,6 @@ typedef enum {
 typedef struct ftdm_sangoma_boost_data {
 	sangomabc_connection_t mcon;
 	sangomabc_connection_t pcon;
-	fd_set rfds;
-	fd_set efds;
 	int iteration;
 	uint32_t flags;
 	boost_sigmod_interface_t *sigmod;
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftmod_sangoma_boost.c b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftmod_sangoma_boost.c
index 339a5a4203..1f9e607490 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftmod_sangoma_boost.c
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/ftmod_sangoma_boost.c
@@ -39,7 +39,7 @@
  */
 
 /* NOTE:
-On WIN32 platform this code works with sigmod ONLY, don't try to make sense of any socket code for win32
+On __WINDOWS__ platform this code works with sigmod ONLY, don't try to make sense of any socket code for win
 I basically ifdef out everything that the compiler complained about
 */
 
@@ -1016,11 +1016,8 @@ static void handle_heartbeat(sangomabc_connection_t *mcon, sangomabc_short_event
 	err = sangomabc_connection_writep(mcon, (sangomabc_event_t*)event);
 	
 	if (err <= 0) {
-		ftdm_log(FTDM_LOG_CRIT, "Failed to tx on ISUP socket [%s]: %s\n", strerror(errno));
+		ftdm_log(FTDM_LOG_CRIT, "Failed to tx on boost connection [%s]: %s\n", strerror(errno));
 	}
-	
-	mcon->hb_elapsed = 0;
-
     return;
 }
 
@@ -1050,7 +1047,6 @@ static void handle_restart(sangomabc_connection_t *mcon, ftdm_span_t *span, sang
 	ftdm_set_flag_locked(span, FTDM_SPAN_SUSPENDED);
 	ftdm_set_flag(sangoma_boost_data, FTDM_SANGOMA_BOOST_RESTARTING);
 	
-	mcon->hb_elapsed = 0;
 }
 
 /**
@@ -1452,6 +1448,7 @@ static __inline__ void init_outgoing_array(void)
  */
 static __inline__ void check_state(ftdm_span_t *span)
 {
+	ftdm_channel_t *ftdmchan = NULL;
 	ftdm_sangoma_boost_data_t *sangoma_boost_data = span->signal_data;
 	int susp = ftdm_test_flag(span, FTDM_SPAN_SUSPENDED);
 	
@@ -1462,17 +1459,23 @@ static __inline__ void check_state(ftdm_span_t *span)
 	if (ftdm_test_flag(span, FTDM_SPAN_STATE_CHANGE) || susp) {
 		uint32_t j;
 		ftdm_clear_flag_locked(span, FTDM_SPAN_STATE_CHANGE);
-		for(j = 1; j <= span->chan_count; j++) {
-			if (ftdm_test_flag((span->channels[j]), FTDM_CHANNEL_STATE_CHANGE) || susp) {
+		if (susp) {
+			for (j = 0; j <= span->chan_count; j++) {
 				ftdm_mutex_lock(span->channels[j]->mutex);
 				ftdm_clear_flag((span->channels[j]), FTDM_CHANNEL_STATE_CHANGE);
-				if (susp && span->channels[j]->state != FTDM_CHANNEL_STATE_DOWN) {
-					ftdm_channel_set_state(span->channels[j], FTDM_CHANNEL_STATE_RESTART, 0);
-				}
+				ftdm_channel_set_state(span->channels[j], FTDM_CHANNEL_STATE_RESTART, 0);
 				state_advance(span->channels[j]);
 				ftdm_channel_complete_state(span->channels[j]);
 				ftdm_mutex_unlock(span->channels[j]->mutex);
 			}
+		} else {
+			while ((ftdmchan = ftdm_queue_dequeue(span->pendingchans))) {
+				ftdm_mutex_lock(ftdmchan->mutex);
+				ftdm_clear_flag(ftdmchan, FTDM_CHANNEL_STATE_CHANGE);
+				state_advance(ftdmchan);
+				ftdm_channel_complete_state(ftdmchan);
+				ftdm_mutex_unlock(ftdmchan->mutex);
+			}
 		}
 	}
 
@@ -1487,7 +1490,6 @@ static __inline__ void check_state(ftdm_span_t *span)
 			ftdm_clear_flag(sangoma_boost_data, FTDM_SANGOMA_BOOST_RESTARTING);
 			ftdm_clear_flag_locked(span, FTDM_SPAN_SUSPENDED);
 			ftdm_clear_flag((&sangoma_boost_data->mcon), MSU_FLAG_DOWN);
-			sangoma_boost_data->mcon.hb_elapsed = 0;
 			init_outgoing_array();
 		}
 	}
@@ -1596,6 +1598,18 @@ static ftdm_status_t ftdm_boost_connection_open(ftdm_span_t *span)
 		ftdm_log(FTDM_LOG_ERROR, "Error: Opening PCON Socket [%d] %s\n", sangoma_boost_data->pcon.socket, strerror(errno));
 		return FTDM_FAIL;
     }
+
+	/* try to create the boost sockets interrupt objects */
+	if (ftdm_interrupt_create(&sangoma_boost_data->pcon.sock_interrupt, sangoma_boost_data->pcon.socket) != FTDM_SUCCESS) {
+		ftdm_log(FTDM_LOG_ERROR, "Span %s could not create its boost msock interrupt!\n", span->name);
+		return FTDM_FAIL;
+	}
+
+	if (ftdm_interrupt_create(&sangoma_boost_data->mcon.sock_interrupt, sangoma_boost_data->mcon.socket) != FTDM_SUCCESS) {
+		ftdm_log(FTDM_LOG_ERROR, "Span %s could not create its boost psock interrupt!\n", span->name);
+		return FTDM_FAIL;
+	}
+
 	return FTDM_SUCCESS;
 }
 
@@ -1603,49 +1617,34 @@ static ftdm_status_t ftdm_boost_connection_open(ftdm_span_t *span)
   \brief wait for a boost event 
   \return -1 on error, 0 on timeout, 1 when there are events
  */
-static int ftdm_boost_wait_event(ftdm_span_t *span, int ms)
+static int ftdm_boost_wait_event(ftdm_span_t *span)
 {
-#ifndef WIN32
-		struct timeval tv = { 0, ms * 1000 };
-		sangomabc_connection_t *mcon, *pcon;
-		int max, activity;
-#endif
+		ftdm_status_t res;
+		ftdm_interrupt_t *ints[3];
+		int numints;
 		ftdm_sangoma_boost_data_t *sangoma_boost_data = span->signal_data;
 
+		ftdm_queue_get_interrupt(span->pendingchans, &ints[0]);
+		numints = 1;
+		/* if in queue mode wait for both the pendingchans queue and the boost msg queue */
 		if (sangoma_boost_data->sigmod) {
-			ftdm_status_t res;
-			res =  ftdm_queue_wait(sangoma_boost_data->boost_queue, ms);
-			if (FTDM_TIMEOUT == res) {
-				return 0;
-			}
-			if (FTDM_SUCCESS != res) {
-				return -1;
-			}
-			return 1;
+			ftdm_queue_get_interrupt(sangoma_boost_data->boost_queue, &ints[1]);
+			numints = 2;
+		} 
+#ifndef __WINDOWS__
+		else {
+			/* socket mode ... */
+			ints[1] = sangoma_boost_data->mcon.sock_interrupt;
+			ints[2] = sangoma_boost_data->pcon.sock_interrupt;
+			numints = 3;
+			sangoma_boost_data->iteration = 0;
 		}
-#ifndef WIN32
-		mcon = &sangoma_boost_data->mcon;
-		pcon = &sangoma_boost_data->pcon;
-
-		FD_ZERO(&sangoma_boost_data->rfds);
-		FD_ZERO(&sangoma_boost_data->efds);
-		FD_SET(mcon->socket, &sangoma_boost_data->rfds);
-		FD_SET(mcon->socket, &sangoma_boost_data->efds);
-		FD_SET(pcon->socket, &sangoma_boost_data->rfds);
-		FD_SET(pcon->socket, &sangoma_boost_data->efds);
-		sangoma_boost_data->iteration = 0;
-
-		max = ((pcon->socket > mcon->socket) ? pcon->socket : mcon->socket) + 1;
-		if ((activity = select(max, &sangoma_boost_data->rfds, NULL, &sangoma_boost_data->efds, &tv)) < 0) {
-			return -1;
-		}
-
-		if (FD_ISSET(pcon->socket, &sangoma_boost_data->efds) || FD_ISSET(mcon->socket, &sangoma_boost_data->efds)) {
-			return -1;
-		}
-
-		return 1;
 #endif
+		res = ftdm_interrupt_multiple_wait(ints, numints, -1);
+		if (FTDM_SUCCESS != res) {
+			ftdm_log(FTDM_LOG_CRIT, "Unexpected return value from interrupt waiting: %d\n", res);
+			return -1;
+		}
 		return 0;
 }
 
@@ -1659,19 +1658,13 @@ static sangomabc_event_t *ftdm_boost_read_event(ftdm_span_t *span)
 	mcon = &sangoma_boost_data->mcon;
 	pcon = &sangoma_boost_data->pcon;
 
-	if (sangoma_boost_data->sigmod 
-#ifndef WIN32
-		|| FD_ISSET(pcon->socket, &sangoma_boost_data->rfds)
-#endif
-		) {
-		event = sangomabc_connection_readp(pcon, sangoma_boost_data->iteration);
-	}
-#ifndef WIN32
+	event = sangomabc_connection_readp(pcon, sangoma_boost_data->iteration);
+
 	/* if there is no event and this is not a sigmod-driven span it's time to try the other connection for events */
-	if (!event && !sangoma_boost_data->sigmod && FD_ISSET(mcon->socket, &sangoma_boost_data->rfds)) {
-		event = sangomabc_connection_readp(mcon, sangoma_boost_data->iteration);
+	if (!event && !sangoma_boost_data->sigmod) {
+		event = sangomabc_connection_read(mcon, sangoma_boost_data->iteration);
 	}
-#endif
+
 	return event;
 }
 
@@ -1684,7 +1677,6 @@ static void *ftdm_sangoma_boost_run(ftdm_thread_t *me, void *obj)
 {
 	ftdm_span_t *span = (ftdm_span_t *) obj;
 	sangomabc_connection_t *mcon, *pcon;
-	uint32_t ms = 10;
 	ftdm_sangoma_boost_data_t *sangoma_boost_data = span->signal_data;
 
 	mcon = &sangoma_boost_data->mcon;
@@ -1719,7 +1711,6 @@ static void *ftdm_sangoma_boost_run(ftdm_thread_t *me, void *obj)
 
 	while (ftdm_test_flag(sangoma_boost_data, FTDM_SANGOMA_BOOST_RUNNING)) {
 		sangomabc_event_t *event = NULL;
-		int activity = 0;
 		
 		if (!ftdm_running()) {
 			if (!sangoma_boost_data->sigmod) {
@@ -1735,27 +1726,17 @@ static void *ftdm_sangoma_boost_run(ftdm_thread_t *me, void *obj)
 			break;
 		}
 
-		if ((activity = ftdm_boost_wait_event(span, ms)) < 0) {
+		if (ftdm_boost_wait_event(span) < 0) {
 			ftdm_log(FTDM_LOG_ERROR, "ftdm_boost_wait_event failed\n");
 			goto error;
 		}
 		
-		if (activity) {
-			while ((event = ftdm_boost_read_event(span))) {
-				parse_sangoma_event(span, pcon, (sangomabc_short_event_t*)event);
-				sangoma_boost_data->iteration++;
-			}
+		while ((event = ftdm_boost_read_event(span))) {
+			parse_sangoma_event(span, pcon, (sangomabc_short_event_t*)event);
+			sangoma_boost_data->iteration++;
 		}
 		
-		pcon->hb_elapsed += ms;
-
-		if (ftdm_test_flag(span, FTDM_SPAN_SUSPENDED) || ftdm_test_flag(mcon, MSU_FLAG_DOWN)) {
-			pcon->hb_elapsed = 0;
-		}
-
-		if (ftdm_running()) {
-			check_state(span);
-		}
+		check_state(span);
 	}
 
 	goto end;
@@ -2235,6 +2216,7 @@ static FIO_CONFIGURE_SPAN_SIGNALING_FUNCTION(ftdm_sangoma_boost_configure_span)
 		sangoma_boost_data->sigmod = sigmod_iface;
 		sigmod_iface->configure_span(span, ftdm_parameters);
 	} else {
+		ftdm_log(FTDM_LOG_NOTICE, "Span %s will use boost socket mode\n", span->name);
 		ftdm_set_string(sangoma_boost_data->mcon.cfg.local_ip, local_ip);
 		sangoma_boost_data->mcon.cfg.local_port = local_port;
 		ftdm_set_string(sangoma_boost_data->mcon.cfg.remote_ip, remote_ip);
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.c b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.c
index 626074dc84..c5cb97119f 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.c
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.c
@@ -311,11 +311,7 @@ sangomabc_event_t *__sangomabc_connection_read(sangomabc_connection_t *mcon, int
 		ftdm_log(FTDM_LOG_CRIT, "Invalid Boost Version %i  Expecting %i\n",mcon->event.version, SIGBOOST_VERSION);
 	}   
 
-	/* Must check for < 0 cannot rely on bytes > MIN_SIZE_... compiler issue */
-	if (bytes < 0) {
-		msg_ok=0;
-
-	} else if ((bytes >= MIN_SIZE_CALLSTART_MSG) && boost_full_event(mcon->event.event_id)) {
+	if ((bytes >= MIN_SIZE_CALLSTART_MSG) && boost_full_event(mcon->event.event_id)) {
 		msg_ok=1;
 		
 	} else if (bytes == sizeof(sangomabc_short_event_t)) {
diff --git a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.h b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.h
index 2e18d406e5..12c3f12b8c 100644
--- a/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.h
+++ b/libs/freetdm/src/ftmod/ftmod_sangoma_boost/sangoma_boost_client.h
@@ -105,10 +105,10 @@ struct sangomabc_connection {
 	unsigned int txwindow;
 	unsigned int rxseq_reset;
 	sangomabc_ip_cfg_t cfg;
-	uint32_t hb_elapsed;
 	/* boost signaling mod interface pointer (if not working in TCP mode) */
 	boost_sigmod_interface_t *sigmod;
 	ftdm_queue_t *boost_queue;	
+	ftdm_interrupt_t *sock_interrupt;
 	ftdm_span_t *span;
 };
 
diff --git a/libs/freetdm/src/include/freetdm.h b/libs/freetdm/src/include/freetdm.h
index aa1da3af56..966cca210b 100644
--- a/libs/freetdm/src/include/freetdm.h
+++ b/libs/freetdm/src/include/freetdm.h
@@ -381,6 +381,42 @@ struct ftdm_event {
 	void *data;
 };
 
+typedef struct ftdm_queue ftdm_queue_t;
+typedef ftdm_status_t (*ftdm_queue_create_func_t)(ftdm_queue_t **queue, ftdm_size_t capacity);
+typedef ftdm_status_t (*ftdm_queue_enqueue_func_t)(ftdm_queue_t *queue, void *obj);
+typedef void *(*ftdm_queue_dequeue_func_t)(ftdm_queue_t *queue);
+typedef ftdm_status_t (*ftdm_queue_wait_func_t)(ftdm_queue_t *queue, int ms);
+typedef ftdm_status_t (*ftdm_queue_get_interrupt_func_t)(ftdm_queue_t *queue, ftdm_interrupt_t **interrupt);
+typedef ftdm_status_t (*ftdm_queue_destroy_func_t)(ftdm_queue_t **queue);
+typedef struct ftdm_queue_handler {
+	ftdm_queue_create_func_t create;
+	ftdm_queue_enqueue_func_t enqueue;
+	ftdm_queue_dequeue_func_t dequeue;
+	ftdm_queue_wait_func_t wait;
+	ftdm_queue_get_interrupt_func_t get_interrupt;
+	ftdm_queue_destroy_func_t destroy;
+} ftdm_queue_handler_t;
+FT_DECLARE_DATA extern ftdm_queue_handler_t g_ftdm_queue_handler;
+
+/*! brief create a new queue */
+#define ftdm_queue_create(queue, capacity) g_ftdm_queue_handler.create(queue, capacity)
+
+/*! Enqueue an object */
+#define ftdm_queue_enqueue(queue, obj) g_ftdm_queue_handler.enqueue(queue, obj)
+
+/*! dequeue an object from the queue */
+#define ftdm_queue_dequeue(queue) g_ftdm_queue_handler.dequeue(queue)
+
+/*! wait ms milliseconds for a queue to have available objects, -1 to wait forever */
+#define ftdm_queue_wait(queue, ms) g_ftdm_queue_handler.wait(queue, ms)
+
+/*! get the internal interrupt object (to wait for elements to be added from the outside bypassing ftdm_queue_wait) */
+#define ftdm_queue_get_interrupt(queue, ms) g_ftdm_queue_handler.get_interrupt(queue, ms)
+
+/*! destroy the queue */ 
+#define ftdm_queue_destroy(queue) g_ftdm_queue_handler.destroy(queue)
+
+
 #define FTDM_TOKEN_STRLEN 128
 #define FTDM_MAX_TOKENS 10
 
@@ -621,6 +657,7 @@ struct ftdm_span {
 	int suggest_chan_id;
 	ftdm_state_map_t *state_map;
 	ftdm_caller_data_t default_caller_data;
+	ftdm_queue_t *pendingchans;
 	struct ftdm_span *next;
 };
 
@@ -673,36 +710,6 @@ struct ftdm_io_interface {
 	fio_api_t api;
 };
 
-typedef struct ftdm_queue ftdm_queue_t;
-typedef ftdm_status_t (*ftdm_queue_create_func_t)(ftdm_queue_t **queue, ftdm_size_t capacity);
-typedef ftdm_status_t (*ftdm_queue_enqueue_func_t)(ftdm_queue_t *queue, void *obj);
-typedef void *(*ftdm_queue_dequeue_func_t)(ftdm_queue_t *queue);
-typedef ftdm_status_t (*ftdm_queue_wait_func_t)(ftdm_queue_t *queue, int ms);
-typedef ftdm_status_t (*ftdm_queue_destroy_func_t)(ftdm_queue_t **queue);
-typedef struct ftdm_queue_handler {
-	ftdm_queue_create_func_t create;
-	ftdm_queue_enqueue_func_t enqueue;
-	ftdm_queue_dequeue_func_t dequeue;
-	ftdm_queue_wait_func_t wait;
-	ftdm_queue_destroy_func_t destroy;
-} ftdm_queue_handler_t;
-FT_DECLARE_DATA extern ftdm_queue_handler_t g_ftdm_queue_handler;
-
-/*! brief create a new queue */
-#define ftdm_queue_create(queue, capacity) g_ftdm_queue_handler.create(queue, capacity)
-
-/*! Enqueue an object */
-#define ftdm_queue_enqueue(queue, obj) g_ftdm_queue_handler.enqueue(queue, obj)
-
-/*! dequeue an object from the queue */
-#define ftdm_queue_dequeue(queue) g_ftdm_queue_handler.dequeue(queue)
-
-/*! wait ms milliseconds for a queue to have available objects, -1 to wait forever */
-#define ftdm_queue_wait(queue, ms) g_ftdm_queue_handler.wait(queue, ms)
-
-/*! destroy the queue */ 
-#define ftdm_queue_destroy(queue) g_ftdm_queue_handler.destroy(queue)
-
 /*! \brief Override the default queue handler */
 FT_DECLARE(ftdm_status_t) ftdm_global_set_queue_handler(ftdm_queue_handler_t *handler);
 
@@ -890,6 +897,8 @@ FIO_CODEC_FUNCTION(fio_alaw2ulaw);
 */
 #define ftdm_socket_close(it) if (it > -1) { close(it); it = -1;}
 
+#define ftdm_array_len(array) sizeof(array)/sizeof(array[0])
+
 static __inline__ void ftdm_abort(void)
 {
 #ifdef __cplusplus
diff --git a/libs/freetdm/src/include/ftdm_threadmutex.h b/libs/freetdm/src/include/ftdm_threadmutex.h
index a970eda522..f67d2840fe 100644
--- a/libs/freetdm/src/include/ftdm_threadmutex.h
+++ b/libs/freetdm/src/include/ftdm_threadmutex.h
@@ -32,7 +32,7 @@ extern "C" {
 #endif
 typedef struct ftdm_mutex ftdm_mutex_t;
 typedef struct ftdm_thread ftdm_thread_t;
-typedef struct ftdm_condition ftdm_condition_t;
+typedef struct ftdm_interrupt ftdm_interrupt_t;
 typedef void *(*ftdm_thread_function_t) (ftdm_thread_t *, void *);
 
 FT_DECLARE(ftdm_status_t) ftdm_thread_create_detached(ftdm_thread_function_t func, void *data);
@@ -43,10 +43,11 @@ FT_DECLARE(ftdm_status_t) ftdm_mutex_destroy(ftdm_mutex_t **mutex);
 FT_DECLARE(ftdm_status_t) _ftdm_mutex_lock(ftdm_mutex_t *mutex);
 FT_DECLARE(ftdm_status_t) _ftdm_mutex_trylock(ftdm_mutex_t *mutex);
 FT_DECLARE(ftdm_status_t) _ftdm_mutex_unlock(ftdm_mutex_t *mutex);
-FT_DECLARE(ftdm_status_t) ftdm_condition_create(ftdm_condition_t **cond, ftdm_mutex_t *mutex);
-FT_DECLARE(ftdm_status_t) ftdm_condition_destroy(ftdm_condition_t **cond);
-FT_DECLARE(ftdm_status_t) ftdm_condition_signal(ftdm_condition_t *cond);
-FT_DECLARE(ftdm_status_t) ftdm_condition_wait(ftdm_condition_t *cond, int ms);
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_create(ftdm_interrupt_t **cond, ftdm_socket_t device);
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_destroy(ftdm_interrupt_t **cond);
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_signal(ftdm_interrupt_t *cond);
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_wait(ftdm_interrupt_t *cond, int ms);
+FT_DECLARE(ftdm_status_t) ftdm_interrupt_multiple_wait(ftdm_interrupt_t *interrupts[], ftdm_size_t size, int ms);
 
 #ifdef __cplusplus
 }
diff --git a/libs/freetdm/src/include/ftdm_types.h b/libs/freetdm/src/include/ftdm_types.h
index 3d45185073..7260358c8f 100644
--- a/libs/freetdm/src/include/ftdm_types.h
+++ b/libs/freetdm/src/include/ftdm_types.h
@@ -40,6 +40,7 @@
 #define FTDM_TYPES_H
 #include "fsk.h"
 
+#define FTDM_INVALID_SOCKET -1
 #ifdef WIN32
 #include <windows.h>
 typedef HANDLE ftdm_socket_t;